AdAware picks up SpywareNo as a reg entry

I have a major concern - so major I'm going to stay on line here until I get an answer.

I have rebuilt my machine - format, XP SP2 install and that's ALL, other than Lavasoft AdAware and Spyware Blaster (both I which I have used for years). There is NOTHING else on this machine. Can someone explain to me why, then, immediately following the installation of SpywareBlaster, AdAware picks up SpywareNo as a reg entry

I am completely taken aback by this. I really hope someone has a plausible explanation.

Thank you so much for the helpful replies, and the links to other posts / forums. The key post in the end was on the Microsoft Support Forum that states (not quoting exactly) that if you hide your desktop icons AdAware 'finds' SpywareNo, and if you 'Show Desktop Items', then 'remove' the SpywareNo reg entry, it will NOT show up in subsequent scans with AdAware. This checks out here exactly as described.

Bizarre, but it clearly is an F/P. I shall now be looking for an alternative scanner as Lavasoft have (not for the first time) caused me to be 'spooked' with an F/P and resulted in me unneccessarily rebuilding my machine to 'get rid' of so called spyware. They have a lot to answer for. If you folks have a solid recommendation for an alternative scanner - preferably free - I'd be very happy to hear about it.